Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要:
The influence of salinity, pH, temperature, and dissolved organic matter on the photolysis rate of 2,4,6-trinitrotoluene (TNT) in marine, estuary, and laboratory-prepared waters was studied using a Suntest CPS�+� solar simulator equipped with optical filters. TNT degradation rates were determined using HPLC analysis, and products were identified using LC/MS. Minimal or no TNT photolysis occurred under a 395-nm long pass filter, but under a 295-nm filter, first-order TNT degradation rate constants and apparent quantum yields increased with increasing salinity in both natural and artificial seawater. TNT rate constants increased slightly with increasing temperature (10 to 32��C) but did not change significantly with pH (6.4 to 8.1). The addition of dissolved organic matter (up to 5�mg/L) to ultrapure water, artificial seawater, and natural seawater increased the TNT photolysis rate constant. Products formed by TNT photolysis in natural seawater were determined to be 2,4,6-trinitrobenzaldehyde, 1,3,5-trinitrobenzene, 2,4,6-trinitrobenzoic acid, and 2-amino-4,6-dinitrobenzoic acid. � 2016
Chemistry Department, U.S. Naval Academy, 572 M Holloway Road, Annapolis, MD, United States; 8823 Commodore Drive, Norfolk, VA, United Kingdom; 370 Stonewall Ct #5104, Mount Pleasant, SC, India; 20518 Crawford Rd Unit A, Lynnwood, WA, United States
Recommended Citation:
Luning Prak D.J.,Breuer J.E.T.,Rios E.A.,et al. Photolysis of 2,4,6-trinitrotoluene in seawater and estuary water: Impact of pH, temperature, salinity, and dissolved organic matter[J]. Marine Pollution Bulletin,2017-01-01,114(2)